LG A2UW18GFAB Owner's Manual

INSTALLATION MANUAL

AIR CONDITIONER

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Please read this installation manual completely before installing the product. Installation work must be performed in accordance with the national wiring standards by authorized personnel only.

Please retain this installation manual for future reference after reading it thoroughly. This product contains Fluorinated Greenhouse Gases. (R410A)

Multi Standard

Original instruction

P/NO : MFL68883816	www.lg.com
REV.00_012618

Young children should be supervised to ensure that they do not play with the air conditioner.

IMPORTANT SAFETY INSTRUCTIONS		3
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• Do not modify or extend the power cable. If the power cable or cord

replaced. There is risk of fire or electric shock.

• For installation, removal or reinstall , always contact the dealer or an Authorized Service Center. There is risk of fire, electric shock, explosion, or injury.

• Do not install the product on a defective installation stand. Be sure that the installation area does not deteriorate with age. It may cause product to fall.

• Never install the outdoor unit on a moving base or a place from where it can fall down.

The falling outdoor unit can cause damage or injury or even death of a person.

• In outdoor unit the step-up capacitor supplies high voltage electricity to the electrical components. Be sure to discharge the capacitor completely before conducting the repair work.

An charged capacitor can cause electrical shock.

• When installing the unit, use the installation kit provided with the product. Otherwise the unit may fall and cause severe injury.

• Indoor/outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals. Improper or loose connections can cause heat generation or fire.

• Safely dispose off the packing materials. Like screws, nails, batteries, broken things etc after installation or svc and then tear away and throw away the plastic packaging bags. Children may play with them and cause injury.

• Be sure to check the refrigerant to be used. Please read the label on the product. Incorrect refrigerant used can prevent the normal operation of the unit.

Operation

•When the product is soaked (flooded or submerged) in water , contact an Authorized Service Center for repair before using it again. There is risk of fire or eletric shock.

•Be sure to use only those parts which are listed in the svc parts list. Never attempt to modify the equipment. The use of inappropriate parts can cause an electrical shock, excessive heat generation or fire.

•Do not touch , operate, or repair the product with wet hands. Hold the plug by hand when taking out. There is risk of electric shock or fire.

	4	IMPORTANT SAFETY INSTRUCTIONS
<![if ! IE]> <![endif]>ENGLISH	• Do not place a heater or other heating appliances near the power
	cable. There is risk of fire and electric shock.
	• Do not allow water to run into electric parts. Install the unit away from
	water sources. There is risk of fire, failure of the product, or electric
	shock.
	• Do not store or use or even allow flammable gas or combustibles near
	the product. There is risk of fire.
	• Do not use the product in a tightly closed space for a long time.
	Perform ventilation regularly. Oxygen deficiency could occur and
	hence harm your health.
	• Do not open the front grille of the product during operation. (Do not
	touch the electrostatic filter, if the unit is so equipped.) There is risk of
	physical injury, electric shock, or product failure.
	• If strange sound, smell or smoke comes from product.Immediately
	turn the breaker off or disconnect the power supply cable. There is
	risk of electric shock or fire.
	• Ventilate the product room from time to time when operating it
	together with a stove, or heating element etc. Oxygen deficiency can
	occur and hence harm your health.
	• When the product is not to be used for a long time, disconnect the
	power supply plug or turn off the breaker. There is risk of product
	damage or failure, or unintended operation.
	• Take care to ensure that nobody especially kids could step on or fall
	onto the outdoor unit. This could result in personal injury and product
	damage.
	• Take care to ensure that power cable could not be pulled out or dam-
	aged during operation. There is risk of fire or electric shock.
	• Do not place ANYTHING on the power cable. There is risk of fire or
	electric shock.
	• When flammable gas leaks, turn off the gas and open a window for
	ventilation befor turning on the product. Do not use the telephone or
	turn switches on or off. There is risk of explosion or fire.

! CAUTION

Installation

• Two or more people must lift and transport the product. Avoid personal injury.

• Do not install the product where it will be exposed to sea wind (salt spray) directly. It may cause corrosion on the product.

IMPORTANT SAFETY INSTRUCTIONS		5
away properly. A bad connection may cause water leakage.		<![if ! IE]> <![endif]>ENGLISH

• Install the drain hose to ensure that the condensed water is drained

• Keep level even when installing the product. To avoid vibration or noise.

• Do not install the product where the noise or hot air from the outdoor unit could damage or disturb the neighborhoods. It may cause a problem for your neighbors and hence dispute.

• Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant levels may cause failure of product.

• Please install safely at a place that can sufficiently endure the weight of the product.

If the strength is not sufficient, the product may fall and cause injury.

Operation

•Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system. There is risk of damage or loss of property.

•Do not block the inlet or outlet of air flow. It may cause product failure.

•Use a soft cloth to clean. Do not use harsh detergents, solvents or splashing water etc. There is risk of fire, electric shock, or damage to the plastic parts of the product.

•Do not touch the metal parts of the product when removing the air filter. There is risk of personal injury.

•Do not step on or put anyting on the product. (outdoor units) There is risk of personal injury and failure of product.

•Always insert the filter securely after cleaning. Clean the filter every two weeks or more often if necessary. A dirty filter reduces the efficiency.

•Do not insert hands or other objects through the air inlet or outlet while the product is operating. There are sharp and moving parts that could cause personal injury.

•Be cautious when unpacking and installing the product. Sharp edges could cause injury.

•If the refrigerant gas leaks during the repair, do not touch the leakaing refrigerant gas. The refrigernat gas can cause frostbite (cold burn).

•Do not tilt the unit when removing or uninstalling it. The condensed water inside can spill.

User must carry routine checkup & cleaning to avoid unit’s poor performance.In case of special situation, the job must be carried out by service person only.

TABLE OF CONTENTS	7

TABLE OF CONTENTS

2IMPORTANT SAFETY 25 AIR PURGING AND EVAC-

		INSTRUCTIONS			UATION
	8	INSTALLATION	25		Checking method
			26		Evacuation
	9	INSTALLATION OF
			27		INSTALLATION PI485
		INDOOR, OUTDOOR
				28	TEST RUNNING
		UNIT
			29		FUNCTION
	9	Select the best location
	10	Fixing Installation Plate
			29		Dip S/W Setting
	11	Piping length and elevation	30		Forced Cooling Operation
	11	Refrigerant charge	31		Wiring Error Check
	12	Drill a hole in the wall	31		Saving Power Consumption
	12 INSTALLATION OF		32		Night Quiet Mode
		WIRED REMOTE CON-	33		Mode Lock
			33		SLC (Smart Load Control) Mode
		TROLLER
			34		PCB Display(18/24 k Model Only)
	14	Wired remote controller installation	35		MAX COMBINATION
	15	FLARING WORK AND
					CAPACITY
		CONNECTION OF PIPING
			36		INSTALLATION GUIDE AT
	15	Flaring work
					THE SEASIDE
	16	Connection of piping - Indoor
	18	Connection of piping - Outdoor	36		SEASONAL WIND AND
	19	CONNECTING THE CABLE
					CAUTIONS IN WINTER
		BETWEEN INDOOR UNIT
			37		Airborne Noise Emission
		AND OUTDOOR UNIT	37		Limiting concentration

19 Connect the cable to the Indoor unit

21 Connect the cable to the Outdoor unit

23CHECKING THE DRAINAGE AND FORMING THE PIPINGS

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23Checking the Drainage

24Forming the Piping

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8 INSTALLATION

INSTALLATION

Installation Parts

Installation plate

Type "B" screws

Type "A" screw (6 EA)	Type "A" screw (8 EA)	Type "A" screw (7 EA)	Type "A" screw and plastic anchors
	Holder Remote Control

Clearance of side discharge unit [Unit : mm(inch)]

Do not install the product where sufficient ventilation is not secured.

The performance may be decreased or the product may not be operated.

s orles -11/16) 500(19

more or

3/8) - (39 0 0 0 1

			16)
			-13/
			300(11ore
			m
			or
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	le		<![if ! IE]> <![endif]>r
	or		<![if ! IE]> <![endif]>o
	-11/16)		<![if ! IE]> <![endif]>mr
500(19			<![if ! IE]> <![endif]>o)8
			<![if ! IE]> <![endif]>/3-93 (000 1
			<![if ! IE]> <![endif]>H
			-13/16)
			300(11or
			more
LD		-3/8)
	1000(39more
		or

or300(11-
more13/16)			113/16)
600(23
			more
			-
or	-		300(1or
		19/	32)
	more

300(11-13/16) or more

2000(78-3/4) or more

600(23-19/32) or more

1000(39-3/8) or more

η In case of series or another installation, please refer to related PDB.

INSTALLATION OF INDOOR, OUTDOOR UNIT	9

INSTALLATION OF INDOOR, OUTDOOR UNIT

Read completely, then follow step by step.

You need to select adequate installation location considering the following conditions, and make sure to acquire the consent of the user.

Select the best location

Indoor unit

1 Do not have any heat or steam near the unit.

2Select a place where there are no obstacles in front of the unit.

3Make sure that condensation drainage can be conveniently routed away.

4 Do not install near a doorway.

5Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles.

6Use a stud finder to locate studs to prevent unnecessary damage to the wall.

! CAUTION

Install the indoor unit on the wall where the height from the floors more than 2.3 meters. (ART COOL Type Only 1.5m)

More than
10cm	More than 20cm

More than

10cm

More than 2.3m

More than

10cm

More than 20cm

More than 10cm

More than 2.3m

More than

10cm	More than 20cm

More than 10cm

More than 2.3m

Outdoor unit

1If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from the condenser is not restricted.

2Ensure that the spaces indicated by arrows around front, back and side of the unit.

3Do not place animals and plants in the path of the warm air.

4Take the air conditioner weight into account and select a place where noise and vibration are minimum.

5Select a place so that the warm air and noise from the air conditioner do not disturb neighbors.

6Place that can sufficiently endure the weight and vibration of the outdoor unit and where even installation is possible.

7Place that has no direct influence of snow or rain.

8Place with no danger of snowfall or icicle drop.

9Place without weak floor or base such as decrepit part of the building or with a lot of snow accumulation.

10 Sufficient ventilation is secured.

Rooftop Installations

If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure and anchoring method are adequate for the unit location. Consult local codes regarding rooftop mounting.

		more than 60cm
	more than	more than
	30cm
		30cm
	more than	more than
	70cm	60cm

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10 INSTALLATION OF INDOOR, OUTDOOR UNIT

Fixing Installation Plate

The wall you select should be strong and solid enough to prevent vibration

1Mount the installation plate on the wall with type "A" screws. If mounting the unit on a concrete wall, use anchor bolts.

-Mount the installation plate horizontally by aligning the centerline using a level.

	Indoor Type	Capacity	Type
		(kBtu/h)
	Wall mounted	9, 12	1, 3
		18	2, 4

<Type 1>

<Type 1>	Installation plate
	105mm	105mm
Chassis	Ø65	Ø65
Hook	65mm	55mm
	Left rear piping	Right rear piping

Type “A”

<Type 2>

2Measure the wall and mark the centerline. It is also important to use caution concerning the location of the installation platerouting of the wiring to power outlets is through the walls typically. Drilling the hole through the wall for piping connections must be done safely.

		Installation plate
101mm		101mm
Ø65	133mm	Ø65
		100mm

<Type 2>	Left rear piping	Right rear piping
	Installation Plate
Chassis	<Type 3>
Hook

Type “A”	Ø65
<Type 3>	45mm
Installation Plate
	140mm

Left rear piping

	Installation plate	45mm
	Ø65
		65mm
		65mm
		Right rear piping

		<Type 4>
	Type “A”		460	567
<Type 4>		Unit
		Outline
	Installation Plate	Ø65		Place a level on raised tab	Ø65
		Left Rear	184	Installation plate	Right Rear
		Piping		156	Piping
		220		(Unit : mm)	307

Type "A" Screws

Chassis

Hook

INSTALLATION OF INDOOR, OUTDOOR UNIT 11

Piping length and elevation

	Multiple Piping Models					(Unit: m)
	Phase	Capacity	Total Length	Max Length	Max Elevation	In-In Elevation
		(kBtu/h)		(A/B)	(h1)	(h2)
		18	30	20	15	7.5
	1Ø	24	50	25	15	7.5
		36	75	25	15	7.5

A	!	CAUTION
	Capacity is based on standard length and
	maximum allowance length is on the
	basis of reliability. If outdoor unit is at
h2	higher elevation than the indoor units,
	after 24m of vertical height, 1 oil trap is
h1	required.
B
Multiple Piping Type

Refrigerant charge

The calculation of the additional charge should be taken in account for the length of extra pipe.

Multiple Piping Models							(Unit: m)
Phase	Capacity		Standard	Max Piping for	Max total	Chargeless	Additional
	(kBtu/h)		Length (m)	one room (m)	Piping Length	Length	Charge (g/m)
	18		7.5	20	30	20	20
1Ø	24		7.5	25	50	22.5	20
	36		7.5	25	75	37.5	20

•Multiple Piping Models

Additional charge (g) = ((A Room Installation Length – Standard Length ) x 20g/m

+(B Room Installation Length – Standard Length ) x 20g/m +.. ) - CF(Correction Factor) x 150

ηCF = Max. number of connectable indoor unit – Total number of connected indoor unit

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12 INSTALLATION OF WIRED REMOTE CONTROLLER

Drill a hole in the wall

Drill the piping hole with a Ø65mm hole core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.

	WALL
Indoor	Outdoor
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INSTALLATION OF WIRED REMOTE CONTROLLER

1Please fix tightly using provided screw after placing remote controller setup board on the place where you like to setup.

-Please set it up not to bend because poor setup could take place if setup board bends. Please set up remote controller board fit to the reclamation box if there is a reclamation box.

2Can set up Wired remote controller cable into three directions.

-Setup direction: the surface of wall reclamation, upper, right

-If setting up remote controller cable into upper and right side, please set up after removing remote controller cable guide groove.

2

2

η Remove guide groove with long nose.

		3
Reclamation to the surface of the wall	1	3

Upper part guide groove

Right part guide groove

<Wire guide grooves>

INSTALLATION OF WIRED REMOTE CONTROLLER 13

3Please fix remote controller upper part into the setup board attached to the surface of the wall, as the picture below, and then, connect with setup board by pressing lower part.

-Please connect not to make a gap at the remote controller and setup board’s upper and lower, right and left part.

<Connecting order>

Wall				Wall
Side				Side

<Separating order>

When separating remote controller from setup
board, as the picture below, after inserting into
the lower separating hole using screw driver and
then, spinning clockwise, remote controller is	Wall	Wall
separated.	Side	Side
- There are two separating holes. Please individu-
ally separate one at a time.
- Please be careful not to damage the inside
components when separating.

4 Please connect indoor unit and remote controller using connection cable.

Please check if connector is normally connected.

Indoor

Unit side

Connecting cable

5Please use extension cable if the distance between wired remote controller and indoor unit is more than 10m.

! CAUTION

When installing the wired remote controller, do not bury it in the wall. (It can cause damage in the temperature sensor.)

Do not install the cable to be 50m or above. (It can cause communication error.)

•When installing the extension cable, check the connecting direction of the connector of the remote controller side and the product side for correct installation.

•If you install the extension cable in the opposite direction, the connector will not be connected.

•Specification of extension cable: 2547 1007 22# 2 core 3 shield 5 or above.

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14 INSTALLATION OF WIRED REMOTE CONTROLLER

Wired remote controller installation

-Since the room temperature sensor is in the remote controller, the remote controller box should be installed in a place away from direct sunlight, high humidity and direct supply of cold air to maintain proper space temperature. Install the remote controller about 5ft(1.5m) above the floor in an area with good air circulation at an average temperature.

Do not install the remote controller where it can be affected by:

-Drafts, or dead spots behind doors and in corners.

-Hot or cold air from ducts.

-Radiant heat from sun or appliances.

-Concealed pipes and chimneys.

-Uncontrolled areas such as an outside wall behind the remote controller.

-This remote controller is equipped with a seven segment LED. display. For proper display of the remote controller LED's, the remote controller should be installed properly as shown in Fig.1. (The standard height is 1.2~1.5 m from floor level.)

yes

no

no

5feet

(1.5meters)

no

Fig.1 Typical locations for remote controller

FLARING WORK AND CONNECTION OF PIPING 15

FLARING WORK AND CONNECTION OF PIPING

Flaring work

Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure.

Cut the pipes and the cable

-Use the piping kit accessory or the pipes purchased locally.

-Measure the distance between the indoor and the outdoor unit.

-Cut the pipes a little longer than measured distance.

-Cut the cable 1.5m longer than the pipe length.

Copper		Slanted Uneven Rough
tube	90°

Burrs removal

-Completely remove all burrs from the cut cross section of pipe/tube.

-Put the end of the copper tube/pipe in a downward direction as you remove burrs in order to avoid dropping burrs into the tubing.

Putting nut on

-Remove flare nuts attached to indoor and outdoor unit, then put them on pipe/tube having completed burr removal.

(not possible to put them on after flaring work)

Flaring work

-Carry out flaring work using flaring tool as shown below.

Outside diameter		A
mm	inch	mm
Ø6.35	1/4	1.1~1.3
Ø9.52	3/8	1.5~1.7
Ø12.7	1/2	1.6~1.8
Ø15.88	5/8	1.6~1.8
Ø19.05	3/4	1.9~2.1

Pipe

Reamer

Point down

Flare nut

Copper tube

	Handle
Bar	Bar
"A"	Yoke
	Cone

Copper pipe

Clamp handle

Red arrow mark

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Firmly hold copper pipe in a bar in the dimension shown in the table below.

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16 FLARING WORK AND CONNECTION OF PIPING

Check

-Compare the flared work with figure below.

-If flare is noted to be defective, cut off the flared section and do flaring work again.

Smooth all round

Inside is shining without scratches.

= Improper flaring =

Inclined Surface Cracked Uneven

damaged thickness

Even length all round

Connection of piping - Indoor

Preparing the indoor unit's piping and drain hose for installation through the wall.

1 Route the indoor tubing and the drain hose in the direction of rear left or right

Drain hose

Drain hose

2Tape the tubing, drain hose and the connecting cable. Be sure that the drain hose is located at the lowest side of the bundle. Locating at the upper side can cause drain pan to overflow inside the unit.

Tape	Tape
Connecting	Connecting
pipe	pipe
Drain hose	Drain hose
Connecting cable	Connecting cable

! CAUTION

If the drain hose is routed inside the room, insulate the hose with an insulation material* so that dripping from "sweating"(condensation) will not damage furniture or floors.

*Foamed polyethylene or equivalent is recommended.

FLARING WORK AND CONNECTION OF PIPING 17

Indoor unit installation

Hook the indoor unit onto the upper portion of the installation plate.(Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installation plate by moving it left and right.

Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots(clicking sound).

Connecting the pipings to the indoor unit and drain hose to drain pipe

-Align the center of the pipings and sufficiently tighten the flare nut by hand.

-Tighten the flare nut with a wrench.

Outside diameter.		Torque
mm	inch	N.m
Ø6.35	1/4	16±2
Ø9.52	3/8	38±4
Ø12.7	1/2	55±6
Ø15.88	5/8	75±7
Ø19.05	3/4	110±10

-When extending the drain hose at the indoor unit, install the drain pipe.

Wrap the insulation material around the connecting portion.

-Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bind them together with vinyl tape so that there is no gap.

-Wrap the area which accommodates the rear piping housing section with vinyl tape.

Connecting

Drain hose

Indoor unit tubing

Flare nut

Pipings

Spanner (fixed)

Flare nut

Torque wrench

Connection pipe

Indoor unit tubing

Drain pipe

Indoor unit drain hose

Adhesive Vinyl tape(narrow)

Plastic bands

Insulation material

	Connection	Indoor
		unit pipe
	pipe

Vinyl tape	Wrap with vinyl tape
(wide)

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18 FLARING WORK AND CONNECTION OF PIPING
- Bundle the piping and drain hose together by	Wrap with vinyl tape
wrapping them with vinyl tape over the
range within which they fit into the rear pip-	Pipe
ing housing section.
	Vinyl tape(wide)
	Drain hose

! CAUTION

Installation Information (For right piping) For right piping, follow the instruction below.

Good case		Bad case
Press on the upper side of clamp and unfold		Following bending type from left to right could
the tubing to downward slowly.		cause problem of pipe damage.

Connection of piping - Outdoor

Align the center of the piping and sufficiently tighten the flare nut by hand.

Connecting pipe order

1)ROOM A~E gas side pipe

2)ROOM A~E liquid side pipe

Finally, tighten the flare nut with torque wrench until the wrench clicks.

-When tightening the flare nut with torque wrench ensure the direction for tightening follows the arrow on the wrench.

Outside diameter		Torque
mm	inch	N.m
Ø6.35	1/4	16±2
Ø9.52	3/8	38±4
Ø12.7	1/2	55±6
Ø15.88	5/8	75±7
Ø19.05	3/4	110±10

Ø12.7(1/2 inch) Connector

Outdoor unit

		Main gas
	Main liquid	side valve
	side valve	Gas side piping
	Liquid	ROOM A
		ROOM B
	side piping
		ROOM C
		ROOM D
		ROOM E

18 K

24 K

36 K

D

CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT 21

Connect the cable to the Outdoor unit

1Remove the cover control from the unit by loosening the screw.

Connect the wires to the terminals on the control board individually as the following.

2 Secure the cable onto the control board with the holder (clamper).

3 Refix the cover control to the original position with the screw.

4Use a recongnized circuit breaker between the power source and the unit. A disconnection device to adequately disconnect all supply lines must be fitted.

1Ø Models

Capacity (kBtu/h)	18	24	36
Circuit Breaker (A)	15	20	25

Outdoor unit

Terminal block

Over 15mm

Holder for power supply cord

Cover control

Power cord

Connecting cable

Loosen terminal screw

Terminal block

! CAUTION

After the confirmation of the above conditions, prepare the wiring as follows.

1Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring, be guided by the circuit diagram posted on the inside of control cover.

2Firmly tighten the terminal screws to prevent them loosening. After tightening, pull the wires lightly to confirm that they do not move. (If they are loose the unit, the unit will not operate normally or it can cause burn-out of the wires.)

3 Specification of power source.

4 Confirm that electrical capacity is sufficient.

5See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate.

6Confirm that the cable thickness is as specified in the power source specification. (Particularly note the relation between cable length and thickness.

7 Do not install an earth leakage circuit breaker in a wet or moist area.

8The following would be caused by voltage drop.

-Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normal function of the overload.

9The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air gap contact separation of at least 3mm in each active(phase) conductors.

10The Power cord connected to the unit should be selected according to the following specifications.

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Round pressure terminal

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22 CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT

Precautions when laying power wiring

Use round pressure terminals for connections to the power terminal block.

Power wire

When none are available, follow the instructions below.

-Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring may cause abnormal heat.)

-When connecting wiring which is the same thickness, do as shown in the figure below.

Connect same thickness

It is forbidden to connect

It is forbidden to

wiring to both sides.

two to one side.

connect wiring of

different thicknesses.

-For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure being exerted on the terminal block.

-Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small head will strip the head and make proper tighterning impossible.

-Over-tightening the terminal screws may break them.

CHECKING THE DRAINAGE AND FORMING THE PIPINGS 23

CHECKING THE DRAINAGE AND FORMING THE PIPINGS

	Checking the Drainage	2 Do not make drain piping.
	To check the drainage.
	1 Pour a glass of water on the evaporator.	Do not raise
	2 Ensure the water flows through the drain
	hose of the indoor unit without any leak-
	age and goes out the drain exit.
	Connecting area	Water
		leakage
	drain hose

		Accumulated
Leakage		drain water
		Air
checking
Drain pan
	Water	Waving
	leakage
Drain
hose
Leakage
checking		Tip of drain hose
		dipped in water

Water leakage Ditch

Less than 50mm gap

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Drain piping

1The drain hose should point downward for easy drain flow.

Downward slope

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24 CHECKING THE DRAINAGE AND FORMING THE PIPINGS

Forming the Piping

Form the piping by wrapping the connecting portion of the indoor unit with insulation material and secure it with two kinds of vinyl tape.

-If you want to connect an additional drain hose, the end of the drain outlet should be routed above the ground. Secure the drain hose appropriately.

In cases where the outdoor unit is installed below the indoor unit perform the following.

1Tape the piping, drain hose and connecting cable from down to up.

2Secure the tapped piping along the exterior wall using saddle or equivalent.

Seal a small opening around the pipings with gum type sealer.

Taping

Drain hose

Pipings

Plastic Connecting band cable

Power supply cord

In cases where the Outdoor unit is installed above the Indoor unit perform the following.

1Tape the piping and connecting cable from down to up.

2Secure the taped piping along the exterior wall. Form a trap to prevent water entering the room.

3Fix the piping onto the wall by saddle or equivalent.

Seal a small opening around the pipings with gum type sealant.

Trap

Trap

•Trap is required to prevent water from entering into electrical parts.

AIR PURGING AND EVACUATION 25

AIR PURGING AND EVACUATION

The air and moisture remaining in the refrigerant system have undesirable effects as indicated below.

-Pressure in the system rises.

-Operating current rises.

-Cooling(or heating) efficiency drops.

-Moisture in the refrigerant circuit may freeze and block capillary tubing.

-Water may lead to corrosion of parts in the refrigeration system.

Therefore, after evacuating the system, take a leak test for the piping and tubing between the indoor and outdoor unit.

Checking method

Preparation

Check that each tube(both liquid and gas side tubes) between the indoor and outdoor units have been properly connected and all wiring for the test run has been completed. Remove the service valve caps from both the gas and the liquid side on the outdoor unit. Check that both the liquid and the gas side service valves on the outdoor unit are kept closed at this stage.

Leakage test

Connect the manifold valve(with pressure gauges) and dry nitrogen gas cylinder to this service port with charge hoses.

! CAUTION

To avoid nitrogen entering the refrigerant system in a liquid state, the top of the cylinder must be higher than its bottom when you pressurize the system. Usually, the cylinder is used in a vertical standing position.

-Do a leakage test of all joints of the tubing(both indoor and outdoor) and both gas and liquid side service valves.

Bubbles indicate a leak. Be sure to wipe off the soap with a clean cloth.

-After the system is found to be free of leaks, relieve the nitrogen pressure by loosening the charge hose connector at the nitrogen cylinder. When the system pressure is reduced to normal, disconnect the hose from the cylinder.

Indoor unit
Manifold valve
		Pressure
Lo	Hi	gauge
Outdoor unit
		Charge hose
		Nitrogen gas
		cylinder(in vertical
		standing position)

! CAUTION

Be sure to use a manifold valve for leakage test. If it is not available, use a stop valve for this purpose. The "Hi" knob of the manifold valve must always be kept close.

-Pressurize the system to no more than 551 P.S.I.G. with dry nitrogen gas and close the cylinder valve when the gauge reading reached 551 P.S.I.G. Next, test for leaks with liquid soap.

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26		AIR PURGING AND EVACUATION
					- Replace the valve caps at both gas and liquid
	!		WARNING
					side service valves and fasten them tight.

Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or explosion.

-There is the risk of death, injury, fire or explosion.

Evacuation

-Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm the "Lo" knob of the manifold valve is open. Then, run the vacuum pump.

The operation time for evacuation varies with tubing length and capacity of the pump. The following table shows the time required for evacuation.

Required time for evacuation when 30 gal/h vacuum pump is used

If tubing length is

If tubing length is

less than 10m (33 ft)

longer than 10m (33 ft)

Less than 0.5 Torr

Less than 0.5 Torr

-When the desired vacuum is reached, close the "Lo" knob of the manifold valve and stop the vacuum pump.

This completes air purging with a vacuum pump. The air conditioner is now ready to test run.

Manifold valve

Lo	Hi	Pressure
		gauge

Open

Open

Vacuum pump

Finishing the Job

-With a service valve wrench, turn the valve stem of liquid side valve counter-clockwise to fully open the valve.

-Turn the valve stem of gas side valve counterclockwise to fully open the valve.

-Loosen the charge hose connected to the gas side service port slightly to release the pressure, then remove the hose.

-Replace the flare nut and its bonnet on the gas side service port and fasten the flare nut securely with an adjustable wrench. This process is very important to prevent leakage from the system.

INSTALLATION PI485

Fix the PI485 PCB as shown in Fig.

Detailed installation method refer to PI485 Installation Manual.

24 kBtu/h

36 kBtu/h

INSTALLATION PI485 27

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28 TEST RUNNING

TEST RUNNING

-Check that all tubing and wiring have been properly connected.

-Check that the gas and liquid side service valves are fully open.

Prepare remote control

Remove the battery cover by pulling it according to the arrow direction.

Insert new batteries making sure that the (+) and (–) of battery are installed correctly.

Reattach the cover by pushing it back into position.

-For reference, the gas side pressure of optimum condition is as below.(Cooling)

	Outside ambi-	The pressure of
Refrigerant		the gas side
	ent TEMP.	service valve.
R410A	35°C (95°F)	8.5~9.5kg/cm2G
		(120~135 P.S.I.G.)

! NOTE

If the actual pressure are higher than shown, the system is most likely overcharged, and charge should be removed. If the actual pressure are lower than shown, the system is most likely undercharged, and charge should be added. The air conditioner is now ready for use.

! NOTE	Intake temperature
• Use 2 AAA(1.5volt) batteries. Do not	Discharge air
use rechargeable batteries.

•Remove the batteries from the remote control if the system is not going to be

used for a long time.

Discharge

temperature

Bolt

Intake temperature

Discharge air

Tubing connection

Discharge

temperature

Evaluation of the performance

Operate unit for 15~20 minutes, then check the system refrigerant charge:

-Measure the pressure of the gas side service valve.

-Measure the temperature of the intake and discharge of air.

-Ensure the difference between the intake temperature and the discharge is more than 8°C.

FUNCTION 29

FUNCTION

Dip S/W Setting

If you set the Dip Switch when power is on, the change in setting is not applicable. The changing setting is enabled only when Power is reset.

Dip Switch

Function

1 2 3 4

Normal Operation (No Function)

Forced Cooling Operation

Wiring Error Check

Saving Power Consumption (Step 1)

Saving Power Consumption (Step 2)

Mode Lock (Cooling)

Mode Lock (Heating)

Night Quiet Mode (Step 1)

Night Quiet Mode (Step 2)

Mode Lock (Cooling) + Night Quiet Mode (Step 1)

Mode Lock (Cooling) + Night Quiet Mode (Step 2)

Mode Lock (Cooling) + Saving Power Consumption (Step 1)

Mode Lock (Cooling) + Saving Power Consumption (Step 2)

Mode Lock (Heating) + Saving Power Consumption (Step 1)

Mode Lock (Heating) + Saving Power Consumption (Step 2)

SLC (Smart Load Control) Mode

! WARNING

When you set the dip switch, you should turn off the circuit breaker or shut the power source of the product down.

!CAUTION

•Unless the applicable dip switch is set properly, the product may not work.

•If you want to set a specific function, request that the installer sets the dip switch appropriately during installation.

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	30 FUNCTION
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36 (1Ø) kBtu/h

SW01N

Forced Cooling Operation

Adding the refrigerant in winter.

Setting Procedure

1Set the Dip Switch as follow after shutting the power source down.

2 Reset the power.

3Check that the Red LED of PCB is on during work.

(The indoor unit is operated by force.)

4Add the specific amount of refrigerant.

!CAUTION

-When the green LED of PCB is on, compressor is going to be off because of low pressure.

-You should return the Dip Switch to operate normally after finishing the operation.